Respuesta :

It seems the function is f(x) = 4x 
So the answer is 1024.
1 x 4 = 4
4 x 4 = 16
16 x 4 = 64.....see the pattern..u r multiplying every number by 4 to get the next number.
So the next number in the pattern would be 256 * 4 = 1024